baber/WOPTO huggingface dataset:
Patent GB-1296354-A (GB)
IPC: F04B13/02
Filed: 1968-10-25
Abstract: 1296354 Reciprocating pumps BRITISH UNITED SHOE MACHINERY CO Ltd 24 Oct 1969 [25 Oct 1968 17 May 1969] 50648/68 and 25242/69 Heading F1A [Also in Division B1] Apparatus for proportioning and mixing polyurethane resin constituents comprises two single acting pumping cylinders 52, 72 actuated by an operating cylinder 102 through a rocking lever 90 fulcrumed at 92; the cross-sectional areas of the pistons 54, 74 of cylinders 52, 72 are in inverse ratio to the distances of their pivot points 62, 82 from that 112 of the operating cylinder, the effect of which is that movement of the lever fulcrum 92 along its support 94 will alter the ratio of the respective constituents but not the total quantity pumped in a cycle. Supply to the pump cylinders is controlled by check valves 65, 66 and 85, 86, and supply of pressure fluid to the operating cylinder by a control mechanism including a micro-switch 120 and contacts 124, 126, the last being adjustable to alter the stroke of the operating cylinder. The control mechanism also supplies pressure fluid to a ram 20 which actuates a discharging piston 14 in the mixer 12. As shown the apparatus is at the extreme bottom of its stroke when it is maintained by the control mechanism during mixing and discharge. The cycle is then completed by the apparatus moving to its rest position indicated by broken lines, which dilutes the residual mixture in the mixer with further ingredient. The operating cylinder may be pivoted to the rocking lever between the pumping cylinders as shown, orits position may be interchanged with that of the fulcrum 92. In the embodiment shown each pumping cylinder fills and discharges in succession, but in another embodiment, see Fig. 3 (not shown) both cylinders are on the same side of the lever and fill and discharge in unison to a continuous discharge mixer. In this embodiment the cylinders discharge through two-way valves (166, 186) which are operated by a solenoid (132) so that the constituents can either be supplied to the mixer or re-circulated to their storage tanks.
Patent GB-1302768-A (GB)
IPC: B64C27/32
Filed: 1970-02-27
Abstract: 1302768 Helicopter rotor hub assemblies WESTLAND AIRCRAFT Ltd 19 April 1971 [27 Feb 1970] 9613/70 Headings B7G and B7W A rotor hub assembly, for example in the tail rotor of a helicopter, comprises a hub 10 having at least three diametrically opposed pairs of radially extending arms 21, each arm being adapted to support a rotor blade (not shown) and being offset axially relative to its preceding and following arm. Each arm 21 incorporates a flapping hinge in a housing 22, which connects each arm 21 to a blade attaching member 11 including a blade mount 17 rotatable on the member 11 to provide blade pitch change. The mounts 17 are rotated collectively by axial movement of a spider 24. A stop 15 in each arm limits the degree of flapping of the respective member 11.
Patent GB-1303886-A (GB)
IPC: D04B27/00
Filed: 1970-01-24
Abstract: 1303886 Knitting machines F M N SCHUSTER & CO 24 Jan 1970 3554/70 Heading G4H [Also in Division D1] The thread consumption from the beams of one or several warp knitting machines the beams each being driven by a main shaft through variable gearing can be automatically regulated by switching in a control device which measures the difference between the actual thread consumption as indicated by an electrical pulse generator associated with the beam being checked and that indicated on a setting device, the switching being controlled by the main shaft of the beam being checked. The rack length is the thread length necessary for knitting 480 courses. As shown warp beams I, 2 are driven through infinitely variable gearing 5 and 6 by the main shaft 11. The beams 1, 2 are engaged by freely rotatable friction wheels 9, 10 which drive photo impulse generators at 5 to 10 times their r.p.m. so that if 250 impulses per second are emitted with a friction wheel of 80 mm. diameter one pulse is emitted per 0À05 mm. if thread withdrawn. Each beam 1, 2 has a preselector index 13, 14 and the two beams are associated with a forward and reverse counting binary counter 16 connected via the contacts A, B, C, D of programme switch 15 to the contacts A 1 , B 1 , C 1 , D 1 , or A 2 , B 2 , C 2 , D 2  of beams 1 or 2 respectively. The starting and stopping of the measuring and transfer to the other beam is controlled by a switch 18 controlled from shaft 11. At the start the number of impulses corresponding to the correct length of thread present in e.g. index 13 is stored in counter 16 the counter lever of index 13 being taken into counter 16. Then counter 16 counts in reverse until the appropriate number of courses has been knitted and if the remaining count is zero then the speed is correct and corresponds to that set in preselector 13 but if a number positive or negative remains in counter 16 at the end, this is passed to device 17 which transforms it into pulses to be fed to step by step motor 7. When counting is terminated, counter 16 generates an impulse which, through conduit 19, switches the programme switch over to the next beam. Two warp beams of each of two knitting machines with independent shafts 11, (21) and main shaft switches 18, (22), Fig. 2 (not shown), may be coupled with one main counter. In another arrangement, Fig. 3 (not shown), an additional index (27) is provided in which the number of impulses of the main shaft impulse generator (25) can be stored and this is continuously compared with secondary counter (28). This arrangement may be used in the feed of elastomeric yarns.
Patent GB-1312136-A (GB)
Title: Glass laminates and a method of the manufacture thereof
IPC: B32B17/10
Filed: 1970-09-10
Abstract: 1312136 Laminated glass THOMAS BENNETT Ltd 22 Oct 1971 [10 Sept 1970] 43310/70 Heading B5N A method of producing a laminated glass comprising two glass plates adhered together by means of a bonding layer of polyvinyl butyral, at least one of the glass plates being wired glass comprises sandwiching polyvinyl butyral between the glass plates, heating the assembly to soften the polyvinyl butyral and further heating the assembly in an autoclave to bond the glass plates together. In a preferred method, glass plates 18 and 20 cleaned by water sprays 12 and cleaning brushes 14 are assembled with an intermediate polyvinyl butyral layer 22, pressed by nip rollers 24 and heated by heaters 26, the assembly is then transferred to an autoclave and a plurality of assemblies heated under pressure.
Patent GB-1312614-A (GB)
Title: Dual hydraulic braking systems for vehicles
IPC: B60T17/22
Filed: 1969-07-01
Abstract: 1312614 Indicating pressure differential between dual braking circuits GIRLING Ltd 14 May 1970 [1 July 1969] 33171/69 Headings F2E and F2F A device for detecting when a differential between the pressures of the brake circuits of a dual hydraulic braking system exceeds a predetermined value, e.g. due to the failure of one circuit, comprises a housing 10 with a bore 11 in which work opposed sleeves 17 and a piston 18 slidable through aligned bores in the sleeves, the pressures of the two circuits being applied to opposite ends of the assembly through radial ports 26, 27, and 28, 29 and the piston 18 has an annular recess 21 engaged by the stem 22 of a switch assembly 14, shoulders 20 engaging the sleeves and circlips or other spring rings 24 housed in annular recesses 25 to prevent separation of the piston 18 from the sleeves. The differential pressure causes axial movement of piston 18 and hence depression of stem 22 to operate the switch to energize a warning lamp. When the fault has been rectified the equalization of pressure returns the piston to the central position.
Patent GB-1314722-A (GB)
Title: Transfer sheets
IPC: B44C1/17
Filed: 1970-04-02
Abstract: 1314722 Transfers J G J PIRON 19 April 1971 [2 April 1970] 15730/70 Heading B6C A transfer sheet comprises a support sheet 1 of cellulose acetate, an image such as the letters L, M or N printed with ink so that the letters project from the sheet 1 in relief and a layer 3 of liquid ink in microcapsules over each letter. When the imaged face of the sheet 1 is placed against a receptive sheet the microcapsules are ruptured through the application of pressure and the ink released is transferred. The support sheet 1 is advantageously of a translucent or transparent material and the ink of the capsules is preferably water based. The ink of the letters L, M or N may be formulated from cellulose acetate dibutyl phthalate, methyl acetate, ethyl acetate and diacetone alcohol.
Patent GB-1319755-A (GB)
Title: Marking device
IPC: B41F15/08
Filed: 1971-12-23
Abstract: 1319755 Selective printing E L PETRIKOVSKY 23 Dec 1971 60039/71 Heading B6F A plurality of type drums 3 with stencil character cut-outs 8a are mounted to rotate about a tube 14 using rollers (2, Fig. 2). Each drum 3 is connected to a selection disc 6 via an endless belt 8. Nozzles 15 spray a marking substance via the selected cut-outs 8a on to an object 18. Each disc 6 is connected to a drive shaft 4 via a coil spring 5. A peg 11 on each disc is arranged to hit one of a plurality of electromagnetically operated catches 9 arranged around each disc. Each catch 9 with its armature 19 defines a character position. After the selection of a catch 9 for each disc 6, by either a keyboard or a telephone dial (not illustrated), a motor 7 rotates via gearing 20 the shaft 4. The springs 5 allow the discs to stop in selected position, the shaft 4 continuing to rotate until a detector 22 detect that the shaft has rotated 360‹. The motor 7 is driven in a reverse direction after printing, whereupon radially extending arms 12 engage pegs 13 on the discs to return them and the drums 3 to the starting position.
Patent GB-1323064-A (GB)
Title: Shaped catalyst pellets
IPC: B01J35/02
Filed: 1969-08-01
Abstract: 1323064 Profiled catalyst pellets IMPERIAL CHEMICAL INDUSTRIES Ltd 23 July 1970 [1 Aug 1969] 38720/69 Heading B1E [Also in Division C5] A generally cylindrical catalyst pellet having at least one indentation (for example in the form of a groove, cone or frusto-cone) or protrusion (for example in the form of a ridge) formed in or on either or each end surface is prepared by compressing catalyst constituent material in a die between two punches at least one of which has a suitably profiled face. Various preferred shapes for the pellet are fully described and illustrated. A catalyst bed may comprise pellets each having a groove or ridge formed in or on each opposite end surface, the pellets in the bed differing between themselves in respect of the orientation of the groove or ridge formed in or on one such end surface relative to the groove or ridge formed in or on the opposite end surface. The pellet, which may have a diameter and overall length each less than 10 mm., may contain any conventional catalytic material selected for example from silica, alumina, oxides of elements of Groups V to VIII, difficultly reducible oxides of elements of Groups II to IV, including hydraulic cements, and metals of Groups IB and VIII. All the catalyst constituents may be present when the pellet is formed; alternatively, catalyst constituents may be added, for example by impregnation, to the formed pellet. Examples relate to pellets containing, in weight per cent, 2.80.3 CoO, 120.1 MoO 3  4.50.5 MgO and the balance Al 2 O 3  (Example 1) and 32 CuO, 54ZnO and 14 Al 2 O 3  (Example 2).
Patent GB-1323878-A (GB)
Title: Combination of a fuel valve and a rectilinear position arrangement
IPC: G05D3/14
Filed: 1969-11-25
Abstract: 1323878 Valve control arrangement ULTRA ELECTRONICS Ltd 10 Nov 1970 [25 Nov 1969] 57577/69 Heading G1N A valve control system comprises an orifice 1, and a restrictor 2 biased to close the orifice, and a coil 4 which provides electromagnetic action on the restrictor to open the valve. As shown the restrictor 2 is connected to armature 5 acted on by the coil 4 against the action of a spring 3, the armature carrying a magnetic shunt 7 which modifies the field of a magnet 8 thereby influencing a Hall device 9, whose output is therefore indicative of the position of the restrictor. Temperature compensation for the device 9 is provided by a similar device 10 situated at a neutral point but under the same ambient temperature, the two devices being connected in a bridge circuit 33. In operation a demand signal from potentiometer 24 is compared with the signal from circuit 33 in comparator 26 to provide a signal which controls the energization of the coil 4 through a driver stage. A modification Fig. 2 (not shown) provides a different magnetic arrangement which eliminates the spring 3, and a potentiometer sensing arrangement instead of the Hall device.
Patent GB-1327374-A (GB)
Title: Reinforcement materials
IPC: D04H3/04
Filed: 1970-08-05
Abstract: 1327374 Fibre-matrix composites NATIONAL RESEARCH DEVELOPMENT CORP 5 Aug 1970 [5 Aug 1969] 39186/69 Heading D1R [Also in Division Cl] A rigid rod for reinforcement uses in composite materials comprises a bundle of fibres and/or filaments each parallel to the axis and embedded in a matrix of carbon or silicon carbide. The fibres may be carbon, boron alumina or silicon carbide whiskers. The rod cross section may be triangular rectangular hexagonal or circular. In one embodiment a continuous tow of 7 micron diameter carbon fibres was passed over a set of rollers immersed in an alcohol solution of phenolic resin then drawn through a circular cross-section die to shape the tow and remove excess resin. The tow was passed through a temperature gradient of up to 200‹C to cure the resin then through a gradient of up to 1000‹C in an inert atmosphere to pyrolyse the resin. The resulting carbon rod was heated to 1200‹C by passing electric current, in an atmosphere of hydrogen and methyldichlorosilane, which decomposed to coat the rod with silicon carbide. The rods may reinforce a phenolic, or aluminium matrix. Alternative protective coatings are carbides of boron, or the metals of groups IVA, VA or VIB, borides, nitrides or oxides, or metals.
Patent GB-1330310-A (GB)
Title: Analog-digital converter
IPC: H03M1/00
Filed: 1970-09-21
Abstract: 1330310 Analogue to digital converters K ARNOLD 21 Sept 1970 44929/70 Heading G4H An analoque to digital converter for providing a binary coded decimal output in accordance with a discretely variable input comprises a single input lead St to four potentiometers P 1-4  connected in parallel, the slides of which are connected to the bases of transistors T 1-4  respectively, connected in parallel across a voltage source UA, the potentiometers being adjusted to cause the transistors to conduct at levels 1, 2, 4, 8 and higher levels of the input respectively, the emitter-collector circuit of each of the transistors having a series magnetic relay D 1-4 . Transistors T 2-4  are provided with load resistors R 2-4  connected to feed back input resistors Ru 1-3  of transistor T 1 , the values of which are adjusted to suppress the input to T 1  at levels 2, 4 and 8 respectively, and also resistor R 3  is connected via Ru 4  to transistor T 2  to suppress its input at the level 4. Thus the valves 1, 2, 4, 2 may be allotted to relays D 1-4  respectively, the output being represented by addition of these values of the activated relays.
Patent GB-1339521-A (GB)
Title: Portable compost container
IPC: C05F17/02
Filed: 1972-02-23
Abstract: 1339521 Compost container G E MITCHELL 17 Nov 1972 [23 Feb 1972] 8320/72 Heading C1B [Also in Division F2] A portable container for converting refuse, waste, grass or straw into compost is characterized in that the wall of the container is formed of lengths each composed of two layers of plastic or like flexible sheeting formed (e.g. by heat sealing) into vertically disposed pockets to contain heat insulative material in moulded or granular form and said lengths being erected in cylindrical three, four or multisided form together with a top cover of the same pocketed heat insulative construction. The container may be easily dismantled and may be made of polyethylene sheet pockets containing expanded polystyrene. Aeration of the compost may be provided by perforations in the walls on the lines of the seams. Figure 1 illustrates a container of one length of walling divided into ten panels A by heat seaming at points B. Opening D is for aeration and discharge of rainwater. Figures 5 and 6 illustrate the positioning of the uprights or supports C, C 2  and C 4 .
Patent GB-1347722-A (GB)
Title: Cam systems for knitting machines more particularly for circular  knitting machines
IPC: D04B15/32
Filed: 1971-07-22
Abstract: 1347722 Knitting-machines; cams WIRKMASCHINENBAU KARL-MARX-STADT VEB 22 July 1971 34384/71 Heading D1C A cam system 2 comprises a tucking cam 12 and a clearing cam 14 rotatable is a sleeve 10 carrying a guard cam 11. The sleeve is also rotatable, and can be locked in any one of three positions - note the positions of cam 11 in Figs. 3-5. Cam 12 and 14 are lockable in one of two positions relative to cam 11- compare Figs. 3 and 4, and 5 and 6. In one position, Figs. 4, 5, cam 14 is withdrawn manually or by pin 18 engaging a slot 20 in the sleeve. The arrangement permits guarding of the butts 4 as they clear, Fig. 3; tuck, Fig. 4; or remain inactive, Figs. 5 and 6.
Patent GB-1348334-A (GB)
Title: Method of controlling cutting operations in the machining of  workpieces on machine tools
IPC: B23Q15/00
Filed: 1971-03-31
Abstract: 1348334 Feed control STARKSTROM-ANLAGENBAU KARL-MARX-STADT VEB 31 March 1971 8294/71 Heading B3B [Also in Division G3] A method of automatically controlling cutting operations on a numerically controlled machine tool, e.g. a lathe, comprises programming a tool traverse so that it is reduced upon a desired loading value of the machine tool being exceeded by a measured actual loading value, and is increased upon the measured actual loading value falling short of the desired loading value, and in which upon the desired loading value being exceeded by the measured actual loading during the slowest permissible tool traverse a reduction of the depth of cut of the tool is effected until the actual loading value is equal to or smaller than the desired loading value, and is characterized in that upon initiation of the reduction of the depth of cut the desired loading value is reduced to a fraction of its original value and the reduction in depth of cut is effected until the actual loading value is equal to or smaller than the reduced desired loading value. A control is effected to ensure that the final machining traverse is not taken at too shallow a cut and too fast a traverse. The length of the machining path may be divided into separate control sections.
Patent GB-1352514-A (GB)
Title: Hydrostatic motors or pumps
IPC: F04B49/00
Filed: 1970-03-23
Abstract: 1352514 Hydraulic reciprocating motors or pumps SELF-CHANGING GEARS Ltd 23 June 1971 [23 March 1970] 13916/70 Heading F1A In a radial piston hydraulic motor or pump, e.g. a vehicle wheel motor, comprising a cylinder block 1 and multi-lobed cam assembly 10 arranged for relative rotation, the block has a plurality of banks of cylinders 4, and a pintle valve assembly 22 is axially slidable within a control sleeve 21 fixed to the cam assembly to make successive banks of cylinders 4 inoperative. In the wheel motor shown, cam assembly 10 rotates with the vehicle wheel attached to flange 18. Sleeve 21 and pintle valve assembly 22 rotate with the cam assembly, sets of ports 26 to 29 in sleeve 21 sequentially connecting cylinder ports 6 to 9 with supply and discharge passages defined by radial vanes within pintle valve sleeve 23, Fig. 2 (not shown). The pintle valve passages communicate with supply and discharge lines via control sleeve passages 30, 32 and connections 33, 34 and 31, 35 respectively. Control rod 48 moves pintle valve assembly 22 axially against spring 49 to cut-off successive sets of control sleeve ports 26 to 28 from the pintle valve passages, pintle sleeve ports 36 to 42 connecting the passages with the remaining operative cylinders and maintaining communication between the passages and control sleeve supply and discharge passages 30, 32. A pressure-relief valve 50 maintains a pressure in the casing interior sufficient to hold the inoperative pistons 5 inwardly of their cylinders, the inner ends of the inoperative cylinders being vented via spaces 61, 58 and pressurerelief passage 59. A brake drum 19 is attached to wheel flange 18. For pump operation, the cam and valve assembly is fixed and the cylinder block rotated. Ball pistons 5 may be replaced by rollers reciprocating in slots in the block.
Patent GB-1353141-A (GB)
Title: Photogrraphic copying apparatus
IPC: G03B27/54
Filed: 1970-02-04
Abstract: 1353141 Photo-copying apparatus H A L  SPENCE-BATE 19 April 1971 [4 Feb 1970] 5409/70 Heading G2A A copying surface 1 for a document is illuminated from the side by diffused light from two housings 4, the copying camera being represented by lens 3. In Fig. 1, light from fluorescent tubes 5 in each housing passes through a ground glass or graduated screen at position 6 or 10. In Fig. 2, light from mercury vapour lamps 20 in each housing is reflected successively from a pivotable mirror 21 and pivotable aluminium diffuser 22. The document may be enclosed in a box open only at the front. The housings may be suitably cooled. Removable shutters may restrict the housing windows.
Patent GB-1354435-A (GB)
Title: Making of dowelled connections
IPC: B27F4/00
Filed: 1972-02-21
Abstract: 1354435 Drilling and dowel inserting machine JAMES BUCHANAN & CO Ltd 14 Feb 1973 [21 Feb 1972] 7935/72 Heading B3C [Also in Division F2] A machine for boring a dowel hole in a workpiece 2 and for inserting a dowel into the hole comprises a table 15 carrying a power drill 17 and a dowel inserting device 16 which has a plunger 21 and means for guiding the plunger to push a dowel along a dowel insertion axis, the table being movable between a drilling position and a dowel inserting position in which the dowel insertion axis is aligned with the line on which the axis of the drill lies when the table is in the drilling position, a support 1 for a workpiece, means for holding a workpiece fixed in position on the support so that a surface of the workpiece frees the drill when the table is in the drilling position, means for advancing the drill along its axis when a dowel hole is to be drilled and means for advancing the plunger along the dowel insertion axis when a dowel is to be inserted. The dowel inserting device has a breech block 18 with a breech 18a aligned with a muzzle 19. An escapement block 26 closes the breech 18a so that chamber 26a communicates therewith. Dowels are fed through a tube 27 and pulses of air from cylinder 29 ensure that a dowel is moved from the escapement chamber into the breech. Movement of slide 15 is controlled by ram 31 with stops 37, 38 on screw 35 limiting the travel. Drills 44, 45, 46 can be operated in conjunction with drill 17 as required. A workpiece is clamped against fence 4 by bar 11 operated by pneumatic cylinders 9, 10. The machine can be operated semi-automatically through appropriate valves and switches.